Classifications

• • C—CHEMISTRY; METALLURGY
  • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
  • C08J—WORKING-UP; GENERAL PROCESSES OF COMPOUNDING; AFTER-TREATMENT NOT COVERED BY SUBCLASSES C08B, C08C, C08F, C08G or C08H
  • C08J9/00—Working-up of macromolecular substances to porous or cellular articles or materials; After-treatment thereof
  • C08J9/04—Working-up of macromolecular substances to porous or cellular articles or materials; After-treatment thereof using blowing gases generated by a previously added blowing agent
  • C08J9/12—Working-up of macromolecular substances to porous or cellular articles or materials; After-treatment thereof using blowing gases generated by a previously added blowing agent by a physical blowing agent
  • C08J9/14—Working-up of macromolecular substances to porous or cellular articles or materials; After-treatment thereof using blowing gases generated by a previously added blowing agent by a physical blowing agent organic
  • C08J9/149—Mixtures of blowing agents covered by more than one of the groups C08J9/141 - C08J9/143
• • C—CHEMISTRY; METALLURGY
  • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
  • C08J—WORKING-UP; GENERAL PROCESSES OF COMPOUNDING; AFTER-TREATMENT NOT COVERED BY SUBCLASSES C08B, C08C, C08F, C08G or C08H
  • C08J9/00—Working-up of macromolecular substances to porous or cellular articles or materials; After-treatment thereof
• • C—CHEMISTRY; METALLURGY
  • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
  • C08G—MACROMOLECULAR COMPOUNDS OBTAINED OTHERWISE THAN BY REACTIONS ONLY INVOLVING UNSATURATED CARBON-TO-CARBON BONDS
  • C08G18/00—Polymeric products of isocyanates or isothiocyanates
  • C08G18/06—Polymeric products of isocyanates or isothiocyanates with compounds having active hydrogen
  • C08G18/08—Processes
  • C08G18/10—Prepolymer processes involving reaction of isocyanates or isothiocyanates with compounds having active hydrogen in a first reaction step
• • C—CHEMISTRY; METALLURGY
  • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
  • C08J—WORKING-UP; GENERAL PROCESSES OF COMPOUNDING; AFTER-TREATMENT NOT COVERED BY SUBCLASSES C08B, C08C, C08F, C08G or C08H
  • C08J9/00—Working-up of macromolecular substances to porous or cellular articles or materials; After-treatment thereof
  • C08J9/0014—Use of organic additives
  • C08J9/0038—Use of organic additives containing phosphorus
• • C—CHEMISTRY; METALLURGY
  • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
  • C08J—WORKING-UP; GENERAL PROCESSES OF COMPOUNDING; AFTER-TREATMENT NOT COVERED BY SUBCLASSES C08B, C08C, C08F, C08G or C08H
  • C08J9/00—Working-up of macromolecular substances to porous or cellular articles or materials; After-treatment thereof
  • C08J9/04—Working-up of macromolecular substances to porous or cellular articles or materials; After-treatment thereof using blowing gases generated by a previously added blowing agent
  • C08J9/12—Working-up of macromolecular substances to porous or cellular articles or materials; After-treatment thereof using blowing gases generated by a previously added blowing agent by a physical blowing agent
  • C08J9/127—Mixtures of organic and inorganic blowing agents
• • C—CHEMISTRY; METALLURGY
  • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
  • C08J—WORKING-UP; GENERAL PROCESSES OF COMPOUNDING; AFTER-TREATMENT NOT COVERED BY SUBCLASSES C08B, C08C, C08F, C08G or C08H
  • C08J9/00—Working-up of macromolecular substances to porous or cellular articles or materials; After-treatment thereof
  • C08J9/04—Working-up of macromolecular substances to porous or cellular articles or materials; After-treatment thereof using blowing gases generated by a previously added blowing agent
  • C08J9/12—Working-up of macromolecular substances to porous or cellular articles or materials; After-treatment thereof using blowing gases generated by a previously added blowing agent by a physical blowing agent
  • C08J9/14—Working-up of macromolecular substances to porous or cellular articles or materials; After-treatment thereof using blowing gases generated by a previously added blowing agent by a physical blowing agent organic
  • C08J9/141—Hydrocarbons
• • C—CHEMISTRY; METALLURGY
  • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
  • C08J—WORKING-UP; GENERAL PROCESSES OF COMPOUNDING; AFTER-TREATMENT NOT COVERED BY SUBCLASSES C08B, C08C, C08F, C08G or C08H
  • C08J9/00—Working-up of macromolecular substances to porous or cellular articles or materials; After-treatment thereof
  • C08J9/04—Working-up of macromolecular substances to porous or cellular articles or materials; After-treatment thereof using blowing gases generated by a previously added blowing agent
  • C08J9/12—Working-up of macromolecular substances to porous or cellular articles or materials; After-treatment thereof using blowing gases generated by a previously added blowing agent by a physical blowing agent
  • C08J9/14—Working-up of macromolecular substances to porous or cellular articles or materials; After-treatment thereof using blowing gases generated by a previously added blowing agent by a physical blowing agent organic
  • C08J9/143—Halogen containing compounds
  • C08J9/144—Halogen containing compounds containing carbon, halogen and hydrogen only
  • C08J9/146—Halogen containing compounds containing carbon, halogen and hydrogen only only fluorine as halogen atoms
• • C—CHEMISTRY; METALLURGY
  • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
  • C08K—Use of inorganic or non-macromolecular organic substances as compounding ingredients
  • C08K5/00—Use of organic ingredients
  • C08K5/0008—Organic ingredients according to more than one of the "one dot" groups of C08K5/01 - C08K5/59
  • C08K5/0016—Plasticisers
• • C—CHEMISTRY; METALLURGY
  • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
  • C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
  • C08L75/00—Compositions of polyureas or polyurethanes; Compositions of derivatives of such polymers
  • C08L75/04—Polyurethanes
• • C—CHEMISTRY; METALLURGY
  • C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
  • C09K—MATERIALS FOR MISCELLANEOUS APPLICATIONS, NOT PROVIDED FOR ELSEWHERE
  • C09K3/00—Materials not provided for elsewhere
  • C09K3/30—Materials not provided for elsewhere for aerosols
• • C—CHEMISTRY; METALLURGY
  • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
  • C08G—MACROMOLECULAR COMPOUNDS OBTAINED OTHERWISE THAN BY REACTIONS ONLY INVOLVING UNSATURATED CARBON-TO-CARBON BONDS
  • C08G2101/00—Manufacture of cellular products
• • C—CHEMISTRY; METALLURGY
  • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
  • C08J—WORKING-UP; GENERAL PROCESSES OF COMPOUNDING; AFTER-TREATMENT NOT COVERED BY SUBCLASSES C08B, C08C, C08F, C08G or C08H
  • C08J2203/00—Foams characterized by the expanding agent
  • C08J2203/12—Organic compounds only containing carbon, hydrogen and oxygen atoms, e.g. ketone or alcohol
• • C—CHEMISTRY; METALLURGY
  • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
  • C08J—WORKING-UP; GENERAL PROCESSES OF COMPOUNDING; AFTER-TREATMENT NOT COVERED BY SUBCLASSES C08B, C08C, C08F, C08G or C08H
  • C08J2203/00—Foams characterized by the expanding agent
  • C08J2203/14—Saturated hydrocarbons, e.g. butane; Unspecified hydrocarbons
• • C—CHEMISTRY; METALLURGY
  • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
  • C08J—WORKING-UP; GENERAL PROCESSES OF COMPOUNDING; AFTER-TREATMENT NOT COVERED BY SUBCLASSES C08B, C08C, C08F, C08G or C08H
  • C08J2203/00—Foams characterized by the expanding agent
  • C08J2203/14—Saturated hydrocarbons, e.g. butane; Unspecified hydrocarbons
  • C08J2203/142—Halogenated saturated hydrocarbons, e.g. H3C-CF3
• • C—CHEMISTRY; METALLURGY
  • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
  • C08J—WORKING-UP; GENERAL PROCESSES OF COMPOUNDING; AFTER-TREATMENT NOT COVERED BY SUBCLASSES C08B, C08C, C08F, C08G or C08H
  • C08J2207/00—Foams characterised by their intended use
  • C08J2207/04—Aerosol, e.g. polyurethane foam spray
• • C—CHEMISTRY; METALLURGY
  • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
  • C08J—WORKING-UP; GENERAL PROCESSES OF COMPOUNDING; AFTER-TREATMENT NOT COVERED BY SUBCLASSES C08B, C08C, C08F, C08G or C08H
  • C08J2375/00—Characterised by the use of polyureas or polyurethanes; Derivatives of such polymers
  • C08J2375/04—Polyurethanes

Definitions

• the invention relates to a prepolymer composition for producing polyurethane insulating foams from pressure vessels, which consists of a prepolymer component with at least one PU prepolymer with an NCO group content of 4 to 20% by weight and conventional additives and a propellant gas component.
• the invention further relates to the use of polybutadiene as an additive to prepolymer compositions for the production of 1-component and 2-component polyurethane insulating foams for controlling cell opening and dimensional stability, and to pressure cans with such a prepolymer composition and, if appropriate, a separate polyol component for producing 1-component and 2-component polyurethane insulating foams .
• the prepolymer composition according to the invention is used to produce polyurethane insulation foams, which are used primarily for insulation purposes by foaming cavities.
• the main areas of application are construction, but also technical products in which cavities have to be filled to avoid condensation nests.
• one-component polyurethane foams are concerned, they are applied and processed on site with a density of 10 to 50 g / l by applying the prepolymer composition from pressure containers, for example aerosol cans, using blowing agents.
• 1-component foams are moisture-curing, ie they can cure only with the help of the moisture and substrate moisture contained in the air.
• two-component polyurethane foams require a second hydroxyl-containing component, usually a polyol, which must be added immediately before the foam is formed. Curing can be accelerated by catalysts.
• Bulk weights for 2-component foams are typically 10 to 100 g / l.
• Transitional forms between 1K and 2K foams are possible.
• an amount of a hydroxyl component which is not sufficient to convert the isocyanate groups is added to the prepolymer before it is applied.
• Such "1.5-component foams" are also detected according to the invention, as are those foams which are produced with more than just one separately added component.
• prepolymer compositions for 1K and 2K polyurethane insulating foams contain a prepolymer component which has a minimum content of reactive NCO groups.
• the prepolymer itself is a polymer of suitable viscosity with terminal NCO groups.
• the composition contains a more or less large amount of monomeric isocyanate.
• Suitable isocyanates are, for example, isophorone diisocyanate, referred to as IPDI, tolylene diisocyanate, also referred to as TDI, diisocyanatotoluene, 1,5-diisocyanatonaphthalene, referred to as NDI, triisocyanatotri-methylmethane, 1,6-diisocyanatohexane, referred to as HDI, or 4,4-diisocyanatodiphenylmethane in raw and pure form or as a mixture.
• IPDI isophorone diisocyanate
• TDI diisocyanatotoluene
• NDI 1,5-diisocyanatonaphthalene
• HDI 1,6-diisocyanatohexane
• 4-diisocyanatodiphenylmethane in raw and pure form or as a mixture.
• 4,4-Diisocyanatodiphenylmethane also known as MDI
• MDI 4,4-Diisocyanatodiphenylmethane
• is particularly common and is used both in the crude form (crude MDI) and in the form of the pure 2,4- and 4,4-isomers or of mixtures thereof.
• the two common TDI isomers can be used alone or in a mixture.
• Such isocyanates are used to produce the prepolymer component hydroxyl-containing polyethers, polyesters or polyhydric alcohols, taking care that the prepolymer receives a viscosity suitable for the composition.
• PU prepolymers suitable for producing polyurethane insulating foams from pressure vessels contain a residual content of unreacted monomeric isocyanate, which can be up to 40%.
• This residual content is mostly production-related, but is also desirable since it has been shown that this residual content has a positive effect on the usability, in particular also the dimensional and dimensional stability of the foams produced therewith.
• monomeric isocyanates despite their generally very low volatility, are classified as hazardous substances due to their toxicity.
• MDI the preferred starting isocyanate for 1-component foams, a MAK value of 500 ppm applies. Because of the toxicity of the ingredients, packaging containing residues of these prepolymers is subject to costly disposal restrictions.
• Low-monomer prepolymers can be prepared, for example, by withdrawing the monomer by distillation and, if appropriate, further reacting with a reactive hydroxyl-containing polyether and / or polyester and / or vegetable oil, modified and unmodified.
• additives that promote the dimensional stability of insulating foams, which additives can be used both with monomer-containing as well as low-monomer and monomer-free prepolymers.
• prepolymer composition of the type mentioned at the outset which contains from 0.01 to 2% by weight, based on the prepolymer component, of polybutadiene or copolymers of 1,3-butadiene with up to 50 mol% of others Has dienes or vinyl aromatic compounds, wherein the polybutadiene or the copolymer has a molecular weight of 1,000 to 9,000.
• polybutadiene By adding a small amount of polybutadiene, it is possible to improve the dimensional behavior of low-monomer PU prepolymers and to obtain a fully foamable, essentially dimensionally stable and fully usable insulating material.
• the polybutadiene can be used in combination with PU prepolymers made from all common isocyanates, but is particularly advantageous in combination with PU prepolymers based on HDI and MDI.
• liquid products such as those offered by Huls AG with a viscosity of at least 500 mPa.s at 20 ° C. can be used as suitable polybutadienes.
• the viscosity is preferably at least 2000 mPa.s at 20 ° C. and in particular about 3000 mPa.s at 20 ° C.
• Particularly suitable is a liquid polybutadiene with about 75% sold under the name Polyöl 130 1,4-cis double bonds, about 24% 1,4-trans double bonds and about 1% vinyl double bonds and a molecular weight (vapor pressure osmotic) of about 3000.
• the content of liquid polybutadiene is 0.01 to 2% by weight. % and preferably 0.05 to 1 wt .-%, each based on the prepolymer component to which it is mixed.
• Suitable polybutadienes are also those products of higher molecular weight which can be added to the prepolymer composition in dissolved form or can be dissolved therein.
• higher molecular weight polymeric hydrocarbons containing double bonds can be used.
• the molecular weight of suitable stabilizing additives is 1000 to 9000, in particular up to 5000.
• copolymers of 1,3-butadiene with other 1,3-dienes such as isoprene, 2,3-dimethylbutadiene and piperylene, as well as with vinyl aromatic compounds, such as styrene, ⁇ -methylstyrene, can also be used.
• Vinyl toluene and divinylbenzene The content of comonomers in the copolymers should not exceed 50 mol%. Copolymers of this type, provided that they are liquid or soluble, are considered to come under the name "(liquid) polybutadiene".
• the dimensional stabilizing effect of polybutadiene is believed to be due to its ability to crosslink in the presence of oxygen.
• polyfunctional isocyanates with an average of 2 to 4 isocyanate groups are used, both in monomeric and oligomeric form.
• these prepolymer compositions are themselves reaction products of monomers or oligomers containing isocyanate groups and thus reactive components, in particular hydroxy-functional compounds.
• Suitable starting polyisocyanates are those mentioned at the outset, as well as those mentioned, for example, in DE-A-42 15 647.
• Isocyanate prepolymers based on HDI, trimerized TDI, NDI, 4,4'-dicyclohexylmethane diisocyanate and IPDI which can be converted particularly easily into low-monomer or essentially monomer-free prepolymers, are particularly suitable for these prepolymer compositions.
• the special effect of promoting dimensional stability occurs not only in connection with low-monomer or essentially monomer-free prepolymers, but also with conventional prepolymer compositions with high monomer contents.
• the NCO content in the prepolymer component used is between 4 and 20% by weight, preferably between 6 and 18% by weight and in particular between 7 and 13% by weight.
• customary components containing hydroxyl groups are used, for example polyether, polyester or also modified vegetable oils with a sufficient OH number, for example in the range from 100 to 300.
• Castor oil with an OH number of about 160 is suitable, also common glycols, especially polyethylene glycols.
• the reduced-monomer prepolymer itself can be obtained, for example, by withdrawing the monomer in a thin-film evaporator.
• (remaining) isocyanate monomer can be reacted with a hydroxyl-containing polyether and / or polyester and / or modified vegetable oil.
• Suitable vegetable oils are those with an OH number of 100 to 300, for example castor oil with an OH number of about 160. According to the invention, it is readily possible to obtain stable foams with such monomer-reduced prepolymer components if the polybutadiene is added.
• a prepolymer composition with less than 10% monomer, in particular less than 5% monomer, is referred to as low-monomer, as essentially monomer-free one with less than 2, preferably less than 1 and in particular less than 0.5% by weight of monomer, in each case referred on the prepolymer component, d. H. the reactive isocyanate-containing component present in the composition.
• Suitable starting prepolymers for 1K and 2K foams based on MDI according to the invention are available, for example, from Bayer under the names Desmodur E21, E23, VP LS 2905 and VP LS 2924, which are already set relatively low in monomer. So far, these materials have not found their way into prepolymer compositions for insulating foams from pressure cans according to TRG 300.
• Desmodur DA and N 3400 have also been shown to be suitable for 1K and 2K foams according to the invention. These have a residual monomeric HDI content of less than 0.5% by weight. Desmodur N 3400 is a dimeric HDI. These materials are too have so far not been used in the production of foam can.
• the prepolymer may contain conventional additives, such as polysiloxanes for cell regulation, flame retardants, plasticizers, catalysts, viscosity regulators, dyes, rheology-controlling additives and the like.
• the prepolymer composition i.e. H. the PU prepolymer including all additives without propellants, an initial service viscosity at 20 ° C from 5000 to 20,000 mPa.s and preferably from 8000 to 15000 mPa.s.
• the content of NCO groups in the PU prepolymer is 4 to 20% by weight, preferably 6 to 18% by weight and in particular 7 to 13% by weight, based in each case on the prepolymer.
• the prepolymer composition according to the invention contains in particular propane, butane and / or dimethyl ether as the propellant gas component.
• Fluorocarbons which can be liquefied under the pressure conditions prevailing in a pressure vessel, for example R 125, R 134a, R 143 and R 152a, are suitable as further propellant gases in the component.
• further gases can be added that are not condensable under the pressure conditions prevailing in the pressure cell, for example CO 2 , N 2 O or N 2 .
• CO 2 is particularly preferred since it is e.g. Solve T. in the prepolymer component and thereby contribute to foam formation, but also acts as a good blowing agent.
• the propellant gas component of the prepolymer composition expediently makes up 5 to 40% by weight.
• the CO 2 content in the propellant gas can be, for example, about 5% by weight, based on the total propellant gas component.
• the content of under the prevailing pressure conditions Non-condensable gases should be dimensioned so that the volume related to the empty space of the pressure vessel results in a pressure of about 8 to 10 bar, depending on the relevant national regulation for pressure vessels (aerosol cans).
• the empty space of the pressure vessel is the space occupied by the uncondensed components of the prepolymer composition.
• the liquid butadiene is expediently added to the prepolymer composition in solution together with an emulsifier, for example in a weight ratio of 80/20, preferably in solution with a hydroxyl-containing vegetable oil which is suitable for controlling the isocyanate content of the PU prepolymer.
• an emulsifier for example in a weight ratio of 80/20
• a hydroxyl-containing vegetable oil which is suitable for controlling the isocyanate content of the PU prepolymer.
• Castor oil with an OH number of 160 has proven to be particularly suitable for this, however any other hydroxyl-containing vegetable oils as well as hydroxyl-containing polyethers and polyesters can be used.
• the prepolymer compositions according to the invention can be used as 1-component and as 2-component polyurethane foams.
• the polyol component required for curing the foam is kept separate from the prepolymer composition in a known manner and is only added immediately before or during application. The processes for this have been described many times and are known to the person skilled in the art, likewise suitable two-component pressure cans with a separate container for the second component.
• customary polyols in particular glycol, glycerin and Butanediol.
• a conventional catalyst for example tin dioctoate, cobalt naphthenate and octoate, dibutyltin dilaurate, metal acetate, in particular iron acetone acetate, DABCO crystalline and N-methyl-2-azanorbornane.
• catalysts are triethylenediamine, trimethylaminoethylpiperazine, pentamethyldiethylenetriamine, tetramethyliminobispropylamine, bis (dimethylaminopropyl) -N-isopropanolamine.
• heteroaromatic amines such as those mentioned in DE-A-42 15 647.
• the invention relates to the use of liquid polybutadiene, as defined above, as an additive to isocyanate prepolymer compositions for 1-component and 2-component polyurethane insulating foams for controlling cell opening and dimensional stability.
• the invention further relates to pressure cans for the application of 1K and 2K polyurethane insulating foams with a prepolymer composition and optionally a polyol component separated therefrom, as described above.
• this has the further advantage that it can be produced essentially free of chlorine and bromine and can be made fire-retardant without the need to add conventional halogen-containing flame retardants.
• flame retardants for B2 foams according to DIN 4102 can be largely or completely dispensed with.
• the composition contains phosphorus-containing thinners or plasticizers (viscosity regulators), for example triethyl phosphate.
• phosphorus-containing thinners or plasticizers viscosity regulators
• the prepolymer compositions can also be adjusted to be essentially halogen-free, ie in addition to halogen-containing flame retardants, it is also possible to dispense with fluorocarbons as propellants.
• the propellant gas component it is sufficient for the propellant gas component to contain propane, butane, dimethyl ether and / or CO 2 .
• the prepolymer composition according to the invention is produced in a manner known per se to the person skilled in the art, with the use of low-monomer prepolymer being added to the pressure vessel as such or being produced there.
• the liquid polybutadiene is then added to the prepolymer, for example in admixture with a surfactant and emulsified in a hydroxy-containing oil, for example castor oil.
• the Hydroxyl-containing oil or castor oil simultaneously serves to fine-tune the NCO content of the prepolymer and to reduce the monomer content.
• the additives such as flame retardants, stabilizers, plasticizers, catalysts, etc. are added, after which the pressure vessel (aerosol can) is closed and the propellant is pressed on or pressed in.
• the invention is illustrated by the following compositions.
• Desmodur E21 as a prepolymer is treated under protective gas with a 1% emulsion of a liquid polybutadiene with a molecular weight of approximately 3000 and a viscosity at 20 ° C. of 3000 mPa.s and a surfactant as an emulsifier (weight ratio 80/20; available from Fa Goldschmidt under the name TEGO IMR 830) in castor oil with a hydroxyl number of 160, the temperature being carefully controlled. Then conventional polysiloxanes for stabilization and colloidal silica gel for controlling the rheology are added together with an amine catalyst (Texacat DMDEE, 2,2-dimorpholinodiethyl ether).
• an amine catalyst Texacat DMDEE, 2,2-dimorpholinodiethyl ether
• the desired amount of the mixture described above is placed in a moisture-free pressure vessel and, if appropriate with the introduction of a cartridge with the second component, closed with a valve-provided dome. After sealing, a coordinated amount of propellant gas is injected.
• the individual components of the propellant gas mixture are expediently pressed on one after the other and, if appropriate, refilled in a second pass.
• a mixture of 40% propane, 40% butane and 20% dimethyl ether in combination with a fluorocarbon (R 152a and R 134a) and CO 2 is suitable.
• a monomer-reduced prepolymer composition and filling proportions for a pressure vessel with a degree of filling of 75% are specified below.
• the composition results in an insulating foam with good dimensional stability and good insulating properties.
• the residual monomer content of the composition is below 10% by weight.
• Prepolymer compositions according to the invention using conventional starting isocyanates were prepared analogously to Example 1 using the following recipes.
• the compositions result in an insulating foam with good dimensional stability and good insulating properties.
• the residual monomer content in the compositions is 7% by weight.
• Desmophen PU 1578 in the list designates a polyol with the OH number 213 and Desmodur 44 V 20 L a polyisocyanate with 31.6% by weight NCO groups.
• Disflamoll DPK is a plasticizer based on diphenyl cresyl phosphate.
• the flame retardant Fyroflex RDP denotes phosphoric acid 1,3-phenylenetetraphenyl ester.
• Prepolymer compositions according to the invention using conventional starting isocyanates were prepared according to the following recipes analogously to Examples 1 to 3.
• the compositions result in an insulating foam with good dimensional stability and good insulating properties.
• the residual monomer content in the compositions is below 10% by weight.
• Desmodur VPLS 2924 designates a prepolymer with an isocyanate content of 24.0%, Firemaster 836 a commercially available flame retardant and the gas mixture a propellant gas mixture of 30% propane, 30% isobutane and 40% dimethyl ether.
• a composition for 1.5K foams was made as follows. component Parts by weight Castor oil 320 Plasticizers 420 Levagard PP (TMCP) Ixol M 125 170 Tego IMR 830 (10%) 50 Tegostab B 1048 30th catalyst 10th Polyol component 1000 Polyol component 142 g Desmodur N 3400 181 g Propellant gas R 134a 30 g R 152a 60 g DME 10 g Crosslinker: ethylene glycol 12 g Thancat AN 10 5g total 427 g NCO (% by weight) 3.86
• Desmodur N 3400 is an aliphatic HDI polyisocyanate with 20% NCO.
• Ixol M 125 is a polyester polyol with an OH number of 239.
• TMCP denotes trismonochloroisopropyl phosphate.

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• Chemical & Material Sciences (AREA)
• Organic Chemistry (AREA)
• Polymers & Plastics (AREA)
• Health & Medical Sciences (AREA)
• Chemical Kinetics & Catalysis (AREA)
• Medicinal Chemistry (AREA)
• Materials Engineering (AREA)
• Engineering & Computer Science (AREA)
• Inorganic Chemistry (AREA)
• Dispersion Chemistry (AREA)
• Polyurethanes Or Polyureas (AREA)
• Manufacture Of Porous Articles, And Recovery And Treatment Of Waste Products (AREA)
• Compositions Of Macromolecular Compounds (AREA)

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• 1994
  • 1994-02-10 CZ CZ952028A patent/CZ202895A3/cs unknown
  • 1994-02-10 CZ CZ952027A patent/CZ202795A3/cs unknown
  • 1994-02-10 CZ CZ952029A patent/CZ202995A3/cs unknown
  • 1994-02-10 AT AT94907538T patent/ATE169312T1/de not_active IP Right Cessation
  • 1994-02-10 DE DE59410392T patent/DE59410392D1/de not_active Expired - Fee Related
  • 1994-02-10 AT AT94907537T patent/ATE156499T1/de not_active IP Right Cessation
  • 1994-02-10 KR KR1019950703312A patent/KR960701135A/ko not_active Application Discontinuation
  • 1994-02-10 DK DK94907537.8T patent/DK0684968T3/da active
  • 1994-02-10 AU AU61082/94A patent/AU690538B2/en not_active Ceased
  • 1994-02-10 WO PCT/EP1994/000385 patent/WO1994018268A1/de active IP Right Grant
  • 1994-02-10 WO PCT/EP1994/000383 patent/WO1994018265A1/de active IP Right Grant
  • 1994-02-10 DE DE59406619T patent/DE59406619D1/de not_active Expired - Lifetime
  • 1994-02-10 JP JP6517669A patent/JPH08506370A/ja active Pending
  • 1994-02-10 AU AU61084/94A patent/AU691484B2/en not_active Ceased
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  • 1994-02-10 WO PCT/EP1994/000384 patent/WO1994018256A1/de active Application Filing
  • 1994-02-10 CA CA002155878A patent/CA2155878A1/en not_active Abandoned
  • 1994-02-10 KR KR1019950703313A patent/KR960701114A/ko active IP Right Grant
  • 1994-02-10 PL PL94310174A patent/PL175824B1/pl unknown
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  • 1994-02-10 JP JP6517670A patent/JPH08506371A/ja active Pending
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  • 1994-02-10 PL PL94310175A patent/PL175833B1/pl unknown
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• 1999
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